Kentucky Population By County in 2021

Updated on August 1, 2024.

Based on the US Census Vintage data estimates, in 2021, the population of Kentucky was 4,507,600. Among all Kentucky counties, Jefferson had the highest population (777,251), followed by Fayette (320,519), and Kenton (169,698). Robertson was the least populated county (2,257).

Hover over or click on the counties in the map below to see the populations. The data can also be found in a table below. You can use the table to sort, filter, and explore the data further.

You can see similar information for other states and by state for the United States.

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Kentucky Population By County in 2021
Kentucky Population By County in 2021
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County Population % of State Population
Adair 18966 0.42
Allen 20839 0.46
Anderson 24084 0.53
Ballard 7687 0.17
Barren 44598 0.99
Bath 12795 0.28
Bell 23834 0.53
Boone 137747 3.06
Bourbon 20224 0.45
Boyd 47757 1.06
Boyle 30604 0.68
Bracken 8440 0.19
Breathitt 13546 0.30
Breckinridge 20687 0.46
Bullitt 83073 1.84
Butler 12302 0.27
Caldwell 12678 0.28
Calloway 37896 0.84
Campbell 92828 2.06
Carlisle 4761 0.11
Carroll 10896 0.24
Carter 26430 0.59
Casey 15940 0.35
Christian 73180 1.62
Clark 36895 0.82
Clay 20161 0.45
Clinton 9282 0.21
Crittenden 8944 0.20
Cumberland 5900 0.13
Daviess 103089 2.29
Edmonson 12237 0.27
Elliott 7361 0.16
Estill 14086 0.31
Fayette 320519 7.11
Fleming 15265 0.34
Floyd 35304 0.78
Franklin 51714 1.15
Fulton 6487 0.14
Gallatin 8763 0.19
Garrard 17366 0.39
Grant 25292 0.56
Graves 36673 0.81
Grayson 26583 0.59
Green 11325 0.25
Greenup 35643 0.79
Hancock 9073 0.20
Hardin 111878 2.48
Harlan 26150 0.58
Harrison 18957 0.42
Hart 19477 0.43
Henderson 44418 0.99
Henry 15708 0.35
Hickman 4426 0.10
Hopkins 45189 1.00
Jackson 12980 0.29
Jefferson 777251 17.24
Jessamine 53603 1.19
Johnson 22548 0.50
Kenton 169698 3.77
Knott 14032 0.31
Knox 30025 0.67
Larue 15027 0.33
Laurel 62580 1.39
Lawrence 16284 0.36
Lee 7462 0.17
Leslie 10280 0.23
Letcher 21224 0.47
Lewis 12991 0.29
Lincoln 24295 0.54
Livingston 8980 0.20
Logan 27804 0.62
Lyon 8435 0.19
McCracken 67546 1.50
McCreary 16804 0.37
McLean 9122 0.20
Madison 93474 2.07
Magoffin 11489 0.26
Marion 19739 0.44
Marshall 31829 0.71
Martin 11165 0.25
Mason 16960 0.38
Meade 30119 0.67
Menifee 6185 0.14
Mercer 22860 0.51
Metcalfe 10391 0.23
Monroe 11260 0.25
Montgomery 28230 0.63
Morgan 13689 0.30
Muhlenberg 30323 0.67
Nelson 47127 1.05
Nicholas 7733 0.17
Ohio 23744 0.53
Oldham 68238 1.51
Owen 11298 0.25
Owsley 3974 0.09
Pendleton 14635 0.33
Perry 27927 0.62
Pike 57416 1.27
Powell 13086 0.29
Pulaski 65571 1.46
Robertson 2257 0.05
Rockcastle 16134 0.36
Rowan 24569 0.55
Russell 18172 0.40
Scott 58316 1.29
Shelby 48588 1.08
Simpson 19734 0.44
Spencer 19887 0.44
Taylor 26187 0.58
Todd 12301 0.27
Trigg 14220 0.32
Trimble 8549 0.19
Union 13254 0.29
Warren 137225 3.04
Washington 12080 0.27
Wayne 19535 0.43
Webster 12852 0.28
Whitley 36761 0.82
Wolfe 6507 0.14
Woodford 27082 0.60